Fixed a spelling mistake, changed back to __proto__ will soon fix that

UNGProject/js/editor.js

@@ -33,7 +33,7 @@ var JSONTextDocument = function() {
     this.type = "text";
 }
 
-JSONTextDocument.prototype = new JSONDocuement();
+JSONTextDocument.prototype = new JSONDocument();
 
 JSONTextDocument.prototype.saveEdition = function(content) {
     this.setContent(content);

UNGProject/js/theme.js

@@ -211,7 +211,7 @@ Document.states = {
 }
 getCurrentDocument = function() {
     var doc = JSON.parse(localStorage.getItem("currentDocument"));
-    doc.prototype = JSONDocument.prototype;
+    doc.__proto__ = JSONDocument.prototype;
     return doc;
 }
 setCurrentDocument = function(doc) {localStorage.setItem("currentDocument",JSON.stringify(doc));}